mod_http2-2.0.26-1.el9
エラータID: AXSA:2024-7933:02
リリース日:
2024/05/30 Thursday - 13:43
題名:
mod_http2-2.0.26-1.el9
影響のあるチャネル:
MIRACLE LINUX 9 for x86_64
Severity:
Moderate
Description:
以下項目について対処しました。
[Security Fix]
- Apache HTTP Server の mod_http2 モジュールには、
初期ウィンドウサイズが 0 である HTTP/2 接続を開始
したクライアントが、サーバにおけるその接続の処理
を無制限にブロックできる問題があるため、リモート
の攻撃者により、初期ウィンドウサイズが 0 である
HTTP/2 接続を複数開始し維持することを介して、
サービス拒否攻撃 (ワーカーリソースの枯渇) を可能と
する脆弱性が存在します。(CVE-2023-43622)
- Apache HTTP Server の mod_http2 モジュールには、
RST フレームによって HTTP/2 ストリームがリセット
された際に、その接続自体が閉じられるまでメモリ
領域が解放されない問題があるため、リモートの攻撃者
により、HTTP/2 の新規のリクエストと RST フレーム
を繰り返し送信することを介して、サービス拒否攻撃
(メモリ枯渇) を可能とする脆弱性が存在します。
(CVE-2023-45802)
解決策:
パッケージをアップデートしてください。
CVE:
CVE-2023-43622
An attacker, opening a HTTP/2 connection with an initial window size of 0, was able to block handling of that connection indefinitely in Apache HTTP Server. This could be used to exhaust worker resources in the server, similar to the well known "slow loris" attack pattern. This has been fixed in version 2.4.58, so that such connection are terminated properly after the configured connection timeout. This issue affects Apache HTTP Server: from 2.4.55 through 2.4.57. Users are recommended to upgrade to version 2.4.58, which fixes the issue.
An attacker, opening a HTTP/2 connection with an initial window size of 0, was able to block handling of that connection indefinitely in Apache HTTP Server. This could be used to exhaust worker resources in the server, similar to the well known "slow loris" attack pattern. This has been fixed in version 2.4.58, so that such connection are terminated properly after the configured connection timeout. This issue affects Apache HTTP Server: from 2.4.55 through 2.4.57. Users are recommended to upgrade to version 2.4.58, which fixes the issue.
CVE-2023-45802
When a HTTP/2 stream was reset (RST frame) by a client, there was a time window were the request's memory resources were not reclaimed immediately. Instead, de-allocation was deferred to connection close. A client could send new requests and resets, keeping the connection busy and open and causing the memory footprint to keep on growing. On connection close, all resources were reclaimed, but the process might run out of memory before that. This was found by the reporter during testing of CVE-2023-44487 (HTTP/2 Rapid Reset Exploit) with their own test client. During "normal" HTTP/2 use, the probability to hit this bug is very low. The kept memory would not become noticeable before the connection closes or times out. Users are recommended to upgrade to version 2.4.58, which fixes the issue.
When a HTTP/2 stream was reset (RST frame) by a client, there was a time window were the request's memory resources were not reclaimed immediately. Instead, de-allocation was deferred to connection close. A client could send new requests and resets, keeping the connection busy and open and causing the memory footprint to keep on growing. On connection close, all resources were reclaimed, but the process might run out of memory before that. This was found by the reporter during testing of CVE-2023-44487 (HTTP/2 Rapid Reset Exploit) with their own test client. During "normal" HTTP/2 use, the probability to hit this bug is very low. The kept memory would not become noticeable before the connection closes or times out. Users are recommended to upgrade to version 2.4.58, which fixes the issue.
追加情報:
N/A
ダウンロード:
SRPMS
- mod_http2-2.0.26-1.el9.src.rpm
MD5: c9b20856bafb05a2081e95d79b6c415f
SHA-256: bd8456037f8b4df53e9e752178dc500d8654267e48f0c67fc84b79015552d049
Size: 1.01 MB
Asianux Server 9 for x86_64
- mod_http2-2.0.26-1.el9.x86_64.rpm
MD5: e3b9877d0995ca33d9b6945ac5d760a6
SHA-256: bc0f46c3f971e806f82a6a9a2bf681d7f2ad02f8d2b42b59fdf628b2b8b146fc
Size: 162.41 kB
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